<template>
    <div class="app-container">
        课程列表
      <!--查询表单-->
      <el-form :inline="true" class="demo-form-inline">
        <el-form-item>
          <el-input v-model="courseQuery.titl" placeholder="课程名称"/>
        </el-form-item>

        <el-form-item>
          <el-select v-model="courseQuery.status" clearable placeholder="课程状态">
            <el-option :value="Nurmal" label="已发布"/>
            <el-option :value="Draft" label="未发布"/>
          </el-select>
        </el-form-item>
        
        <el-button type="primary" icon="el-icon-search" @click="fetchData()">查询</el-button>
        <el-button type="default" @click="resetData()">清空</el-button> 
      </el-form>

      <!-- 表格 -->
      <el-table
        :data="list"
        border
        fit
        highlight-current-row>

        <el-table-column
        label="序号"
        width="70"
        align="center">
          <template slot-scope="scope">
            {{ (page - 1) * limit + scope.$index + 1 }}
          </template>
        </el-table-column>

        <el-table-column prop="title" label="课程名称" width="80" />

        <el-table-column label="课程状态" width="80">
          <template slot-scope="scope">
            {{ scope.row.status==='Normal'?'已发布':'未发布' }}
          </template>
        </el-table-column>

        <el-table-column prop="lessonNum" label="课时数" />
        <el-table-column prop="gmtCreate" label="添加时间" width="160"/>
        <el-table-column prop="viewCount" label="浏览数量" width="60" />

        <el-table-column label="操作" width="200" align="center">
          <template slot-scope="scope">

            <router-link :to="'/teacher/edit/'+scope.row.id">
              <el-button type="primary" size="mini" icon="el-icon-edit">编辑课程基本信息</el-button>
            </router-link>

            <router-link :to="'/teacher/edit/'+scope.row.id">
              <el-button type="primary" size="mini" icon="el-icon-edit">编辑课程大纲</el-button>
            </router-link>

            <el-button type="danger" size="mini" icon="el-icon-delete" @click="removeDataById(scope.row.id)">删除</el-button>
          </template>
        </el-table-column>
      </el-table>

      <!-- 分页 -->
      <el-pagination
        :current-page="page"
        :page-size="limit"
        :total="total"
        style="padding: 30px 0; text-align: center;"
        layout="total, prev, pager, next, jumper"
        @current-change="fetchData"
      />
    </div>
</template>
<script>
import * as course from '@/api/edu/course'

export default {
  data() {
    return {
      list: null,
      page:1,
      limit:5,
      total:0,
      courseQuery:{}
    }
  },
  created() {
    this.fetchData()
  },
  methods: {
    //删除课程
    removeDataById(id){
            this.$confirm('此操作将永久删除该课程, 是否继续?', '提示', {
                confirmButtonText: '确定',
                cancelButtonText: '取消',
                type: 'warning'
            }).then(() => {
                course.deleteCourse(id)
                    .then(response => {
                            //提示信息
                            this.$message({
                                type: 'success',
                                message: '删除课程成功!'
                            });

                        //刷新页面
                        this.fetchData()
                    })
            })
    },
    fetchData(page = 1) {
      this.page = page
      course.getCourseList(this.page,this.limit,this.courseQuery)
            .then(response => {
              this.list = response.data.list 
              this.total = response.data.total
            })
    },
    resetData(){
      this.courseQuery = {}
      this.fetchData()
    }
  }
}
</script>
